Reverse brake for automobiles



Nov. 12, 1929. v

M. A. MIKESH REVERSE BRAKE FOR AUTOMOBILES Filed Feb. 9, 1925 PEL 2Sheets-Sheet. l

Mn QT/N A M/KESH, I

A TTORNEYS.

Nov. 12, 1929. M A, MIKESH 1,735,332

REVERSE BRAKE FOR AUTOMOBILES Filed Feb' 9. 1925 2 Sheets-Sheet 2ATTORNEYS.

Patented Nov. 12, 1929 MARTIN A. MIKESH, F MILWAUKEE, WISCONSIN REVERSEBRAKE FOR AUTOMOBILES Application filed February 9, 1925. Serial No.8,055.

The invention relates to an auxiliary brake operated in conjunction withthe transmission, and its purpose is the provision of quick-acting meanswhich will enable the operator to overcome the reverse movement of thecar when the latter has been halted in ascending a grade in the roadway.

Under such conditions, when the ordinary brakes are released at themoment of picking 1o up, there is a tendency upon the part of the car tomove backward down the grade, and it requires very careful attention andmanipulation of the cliitch, brakes and accelerator to overcome suchtendency and effect forward movement of the car without stalling theengine.

The invention resides in an auxiliary clutch or brake for thetransmission shaft which is brought into action by an overthrow of thetransmission lever, when the low-gear connection is effected preparatoryto again starting the car, the connections being such that the shaft isrestrained from rotation at such time but is released immediately as themain clutch is engaged upon relaxation of the overthrow of thetransmission lever, the auxiliary braking devices becoming inoperativein such relaxing movement.

The details of the invention will now be particularly described, and thenovelt thereof will be pointed out in the appended claim.

In the accompanying drawings:

Figure l is a view in in longitudinal vertical section, of theconventional transmission with my improvements applied thereto.

Fig. 2 is an end elevation, looking from the right of Fig. 1.

Fig. 3 is a fragmentary view in elevation, looking from the oppositeside of Fig. 1.

Fig. 4 is a diagram showing the several positions of the transmissionlever, and showing the direction and extent of the overthrow movement ofthe said lever.

Figs. 5, 6 and 7 are details of a modification the devices shown in Fig.1.

Referring to the drawings, the numeral 10 indicates the transmissioncase in which is mounted the transmission lever 11, the slide l2, andthe transmission shaft 13, the latter side elevation, partlybeingconnected to the drive universal joint. Upon the shaft through alatter is mounted gagement at all times, will rotate as one part.

Upon the outer so that they ordinarily face of the member 15,

a circular row of teeth 18 is formed, the said teeth being arranged forengagement by a hook pawl 19, formed upon an arm of a bellcrank lever20, pivotally mounted upon a pin 21, fixed in the transmission casing10. The other arm 22 of the bell-crank is provided with an upstandingadapted to be engaged by proj ection 23,

a pm 24, set transversely in the transmission slide 12.

A confi ned expansion spring 25 bears against the underside of the arm22, and normally holds the bell-crank in a position in which the 18 ofthe clutch member pawl is disengaged from the teeth 15, and stands atone side thereof. The pin 24, fixed in the rear end of the slide 12, isadapted in the overthrow movement of the lever 11, to

engage the projection 23, and turn the bell-crank, following the shiftinto low gear.

Such movement of the bell-crank will engage the pawl thereon with theteeth 18,

and serve to hold the shaft 13 against rotation ordinarily. Thefrictional enga and 15 of t vided for the ement between the members 14 eauxiliary cone clutch, is propurpose of avoiding too sudden a jar, incase the car has already started to move backward.

The arresting devices can operation only when a shift made, and the bebrought into into low gear is overthrow involves a movement of the freeend of the transmission lever to the extent of about three-fourths ofan'inch only. in cars at the present time, purpose of this invention toUnder the conditions existing which it is the remedy, the optoione-'Lion the euom ecoleS 'eo l upper noteh 292.

of the piyofe pim, es 202 The oem 3@ eeeiies upon iis kilosizonelyexenimg eem oi @e ,3L e epring-pessed pio 32, "point o" yviaioii isedeoed `foo eneiQ els'iei of the noeeies 202 im die mii-oemig. Theexpensomsp'rimg pea Si? emi this im tum egeins: tile unoiesie of' sheerm 33 of fue oeii--emoks so es io normeiiy the iettef emi Witn'few ehepeyvL es heore cesoibeci. A seep is errengeci zo erres's eine movementof ehe ieeii-orenk unoer the pessure of thespyings when the pin 24 isdisengege. iom the heil-crank by the moyemeni: of `eine sensmissionievei e0 any .ohoei than iow gees' position, the stop 3e wiii engagetile heli-crank, emi the spying 25 will continue eo move theo-omi Si,"eo oery he sping-piessed pin from Hoe lowe zo ne The pars Wiii remaines thus posione until after the shift to iowgeer position has been mede,when iie cem 30 will be struck by the pin 2e, :m es the pewi i9 engagesthe teeih i8, the oem Wiii be turned so es to pess'the sping-pressecipin 32 into the lower mosh 2O2 of ehe erm. This construction provides econnection befuweon the pests which Willi yield so es to avoid suofieeshocks and sereine.

Heyinghue deseiibeci my iiiy'enfbiozl9 what oieim and esire eo secure byLeiters 'Pet-ent o "ehe 'United States, is:

The combination en automobile emesmission keying e ciuoh shaft and eshifting ieyei movable "iom e neufmfel 'position im which se'teemsmissioo is imooereeiye eo e plurality o' @thee oosieiooe ivy/icmLsei@

